construction of 1st floor

Dear Sir,

Thanks. I have done shuttering work for 1st floor, but I find gaps between steel plates and brick walls and between themselves. Mason is doing Gawri with loose sand and cement mix (10 : 1) on roof top. This may fill the gap on roof top but gap between brick walls and shuttering material (plate or wood) remains as such. I intend to use ready mix (M 25) supplied by RM manufacturers, to be poured by Pump. I am told RM supplied is thin slurry, my worry is that RM will flow down on walls or from roof top, wherever gaps are prominent. Please inform, whether Gawri can stop the RM from flowing down and what sort of packing can be done to fill gaps between walls and shuttering material.

How much RM (I intend 14 cu m) should be ordered to the firm for 5 inch thickness of RCC slab for area of 950 sq ft plus Latak beam of 1 ft, with 200 ft length. They want 100 % advance. Is it industry practice to take 100 % advance before supplying the RM

regards,

SCK

Along with Gawri for plugging gap between brick wall and plates/wooden phate`s, I am planning to put single layer of empty cement bag which is of PP and may hold RM from flowing down. Or I am planning to put iron mesh (machar jalli) below the gawri material (mud or sand mix) which may hold the RM at the time of pouring it. The iron mesh is lying as waste with me during dismantling of plastic shade shaft on 1st floor.

I am mulling over such issues and putting on hold LOHAR`s work for a while.

Dear Sir,

Thanks, gawri work is to be done on rooftop also, but today, I expect the gawri to be completed and Lohars work will follow suit.

Kindly let me know, how much quantity of M 25 RM concrete to be ordered for following :

1 DR -                    20 `x 13 ` =  260 sqft 

1lobby -                20 `x 8` =   160 sqft

1 BR -                     18` x 13` =    234 sqft

1 BR-                      10` x 13`=     130 sqft

                                                         1005 sqft

Plus latak beams of length wise – (48`+52`)+  breadthwise - (30` +30`+20`). All above 5 latak beams are  of 8 `` width with depth of 17 `` (12`` latak + 5`` RCC slab of roof).

regards,

SCK

A small error occurred in stating above, length of latak beams is 200 ft (48+ 52+30+30+20+20) instead of 180. Meanwhile Gawri work is over. Jaal (12 mm as main beam and 10mm in sec beam) work is being done by Blacksmith. I am suggesting him to make crank in DR(20x13) and in 1 BR (18x13) on L/4 basis.

Any problem, if RM concrete is poured without vibrator, I am not able to locate a vendor who gives vibrator on rent.

SCK

Thanks for this valuable advise. I shall try to do compacting with steel rods. It means keeping  3-4 beldar during pouring of RM mix. I am told that with pump, RM mix comes with great force and so coping manually with rods will be difficult with speed of pouring. They say that one load of 6 cu m with pump will be emptied in 30 minutes. 

 Gawri is over with sand mix, mud, some where iron mesh -machhar jali,  plastic bags, card boards etc. Black smith work is on along with cranks where ever required.

Keeping in view that Mumty (12` x 9` x 5``) is also to be covered, I am planning to order 16 cu m with flexibility of increasing / decreasing order by 10 % in 3rd load of 6 cu m.

regards,

After laying of RCC slab, what can be done over the roof

What type of material should be used for doing water proofing over roofing of RCC slab.

or u feel that nothing needs to be done and roofing of new RCC slab can be left as such, till any problem comes.

What sort of flooring can be done over the roof

SCK